摘要
本文研究饱和不饱和渗流的有限元数值模拟。采用Picard迭代处理问题的非线性;建立了适合于任意四边形单元的系数矩阵计算的影响系数算法。对土壤吸水和堤坝渗流的计算表明,本文算法是成功的。
A Galerkin finite element formulation is developed for the numerical simulation of water flow in variably saturated porous media. Picard algorithm is used to cope with severely nonlinear field problems. The algorithm is formulated for arbitrary quadrilateral elements which can accommodate complex geometry. A new 'influence coefficient' technique is developed which can be used to compute element matrices in a simple and efficient manner. This technique avoids numerical integration and leads to a substantial saving of computational cost. Two examples are presented to verify the proposed algorithm.
出处
《水动力学研究与进展(A辑)》
CSCD
北大核心
1991年第A12期12-18,共7页
Chinese Journal of Hydrodynamics
关键词
渗流
有限元法
影响系数法
water flow in porous media,finite element method,influence coefficient technique.